killpg

NAME

       killpg - send signal to a process group

SYNOPSIS

       #include <signal.h>

       int killpg(int pgrp, int sig);

DESCRIPTION

       Killpg  sends  the  signal  sig to the process group pgrp.
       See sigaction(2) for a list of signals.   If  pgrp  is  0,
       killpg  sends  the signal to the sending process's process
       group.

       The sending process and members of the process group  must
       have the same effective user ID, or the sender must be the
       super-user.  As a single special case the continue  signal
       SIGCONT may be sent to any process that is a descendant of
       the current process.

RETURN VALUE

       On success, zero is returned.  On error, -1  is  returned,
       and errno is set appropriately.

ERRORS

       EINVAL Sig is not a valid signal number.

       ESRCH  No process can be found in the process group speci-
              fied by pgrp.

       ESRCH  The process group was given as 0  but  the  sending
              process does not have a process group.

       EPERM  The  sending  process is not the super-user and one
              or more of the target processes  has  an  effective
              user ID different from that of the sending process.

HISTORY

       The killpg function call appeared in BSD4.0.

SEE ALSO

       kill(2), getpgrp(2), signal(2)